Fastening



July 27, 1937. E. H. BASTABLE FASTENING Original Filed April 5, 1935//Vl/E/\/ TOR ZM/ ham Patented July 27, 1937 mm STATES Ar r or iessignor to United Shoe Machinery Corporation,

Paterson, N. 3., a corporation of New Jersey Original application April5, 1935, Serial No. Divided and this application March 13, 1936, SerialN0. 68,736

1 Claim.

This invention relates to fastenings, it being especially adapted foruse in the assembly employed in performing the method described andclaimed in the application for Letters Patent of the United States forimprovements in the Art of attaching heels to shoes, filed in my name onApril 5, 1935, and bearing the Serial No. 14,893, of which thisapplication is a division.

In the attaching of shoe-heels, and particularly those of wood, it is acommon practice to interpose an adhesive between the heel-seat-surfaceof a shoe and the cup of a heel which is to be applied thereto, and thento fix the heel temporarily in place by a screw-fastening until saidadhesive has set. After this, the temporary fasteningis removed, andpermanent fastening means, as a screw or nails, inserted. On account ofirregularities of the heel-s'eat-surface, and lack of correspondencebetween the contours of 2 said surface and the cup of the heel which isto be seated thereon, it is difficult toobtain proper contact betweenthe surfaces and therefore an adequate adhesive bonding. This difficultyis overcome by the improved method above mentioned and by thelast-and-screw assembly employed in performing said .method. The presentinvention has as an object the provision of a screw or like integralfastening so formed as to be capable, in such a connection, of applyingto a 30 shoe and its heel forces which will both urge theheel-seat-material into the cup of the heel and at the same time drawtogether the periphery of said cup and the heel-seat. This fastening hasan elongated, cylindrical head, a screwthreaded shank of substantiallythe same length as the head and an intermediate hub. There are twoannular shoulders between the head and shank, the shoulder farthest fromthe shank being the larger and gradually inclined toward the hub. Thislast-mentioned shoulder is for engagement with the last, while the otherwill contact with the inner surface of the heel-seat of a shoe upon thelast. The threaded shank co-operates with the shoulders, when thefastening is in use, to draw a heel toward the parts engaged by saidshoulders.

In the drawing,

Fig. 1 is a side elevation, with parts broken away and shown in section,of a shoe mounted on a last with which my improved fastening is to beemployed;

Figs. 2 and 3 are fragmentary sections showing the rear portion of thelast and shoe, the fastening means being associated with them andoccupying, respectively, its initial and final positions;

Fig. 4 is an fastening; and

Fig. 5 is a side elevation of a drill suitable for the formation of ahole for the reception of the fastening.

Referring to the drawing, the numeral l designates a last which may beof the usual type, except for such details as are hereinafter describedpertaining to the present invention. As shown herein, it has the usualspindle-hole '2 and the nail-clinching plate 3 secured to the heel-seatportion. Upon the last appears a shoe S. 15

In accordance with my invention, the rear part of the last is providedwith a substantially vertical bore or passage it, which, for example,may be about 0.31" in diameter. The clinch-plate has a circular openingii, substantially concentric with the bore it and being somewhat smallerin diameter, for example about 0.21, to provide an annular shoulder l2which is in effect integral with the last.

enlarged side elevation of the My improved fastening i i preferablyconsists 2 7 of a unitary piece of case-hardened steel having acylindrical head it, which is furnished with means, such as a slot 56,for receiving a screwdriver or like tool. The diameter of the head issuch as snugly to fit the bore iii of the last, it being greater thanthe diameter of the opening I I in the clinch-plate 3. The head-diametermay be about 0.30". The inner end of the head terminates in an annularinwardly beveled abutment or shoulder i8 engageable with the shoulder I!of the last, as shown in Fig. 3. The bevel of the shoulder itfacilitates the introduction of the fastening into the last-bore andfurnishes more extended contact with the inclined surface of theshoulder l2. Next to the head is a cylindrical hub Hi, this beingslightly smaller in diameter than the opening in the clinch-plate, forexample 0.195" to 0.200", the end 20 of the hub providing a second flatabutment or shoulder to engage the insole of a shoe on the last. Thelength of the hub maybe varied in accordance with the heel to beattached, the thickness of the clinch-plate, etc. In all cases, itshould be such as to project outwardly beyond the clinch-plate adistance suflicient to force the heel-seat material of the shoe S bycontact of the shoulder 20 into close engagement with the cup of theheel to be attached. The shank or end 22 of the fastening l4 oppositethe head is screw-threaded, the length being substantially that of thehead l5 and such as to enter the heel far enough to insure a firm grip,while its pitch may be substantially the same as an ordinary No. 10woodscrew.

A drill 25 used to form a hole in the work to receive the threaded shank22 should be of a size which will pass freely through the opening II inthe plate 3, for example about 0.185" in diameter. The drill is shown asprovided With a shank 2? fitting the bore it of the last. Preferably,the end of the shan'x adjacent to the drill furnishes a shoulder 28engageable with the last-shoulder l2, thus providing a stop which limitsthe depth of the hole to be drilled. The drill may project outwardlybeyond the shoulder 28 a distance sufiicient to penetrate to a depth ofapproximately 0.5 into a heel applied to the heel-seat of the shoe S.

My improved fastening may be utilized to perform the method alreadyoutlined in substantially the following manner: An insole (iii, outsole3!, upper 32 and, if desired, a shank piece 33 of the shoe S areassembled about the last i with the margin of the upper turned over onto the under surface of the insole and secured thereto, as, for example,by lasting tacks. The upper 32 may be understood to include an outerelement, lining, doubler and counter, if such parts be employed. Theshoe S may have the outsole secured in any desired manner to the lastedinsole and upper, and the rear part beveled at its edges to provide asuitable heel-seat.

for the cup of the heel 35, as 'is customary. Having prepared the shoeas above outlined, and assuming that it is otherwise ready for theattachment of the heel, a coating of an adhesive to may be applied tothe heel-seat-surface of the sole or to the cup-surface of the heel orto both, and having clamped the heel in contact with the heel-seat, thedrill 25 is introduced through the bore H3 and rotated to provide a hole12 which extends through the insole outsole 3i and shank-piece 33 andinto the heel as shown in Fig. 1. The engagement of the drill-shoulder28 with the shoulder E2 of the clinch-plate, because of thesubstantially unvarying position of the stop which it furnishes upon alllasts, determines accurately the depth of the hole. After the drillingoperation has been completed and the drill withdrawn, the fastening M.is inserted, and by means of a screw-driver or other tool is rotated tocause the shank 22 to cut its way into the wall of the heel-opening 32,forming a thread therein. During the movement of the fastening, the heelis drawn toward the last by the engagement of the shoulder l8 with theshoulder l2 of the'last. By reason of the engagement of the shoulder Nof the fastening with the insole of the shoe, the heel-seat issimultaneously forced away from the last into close contact with thecupped surface of the heel, as will appear by a comparison of Figs. 2and 3. As the force exerted by the shoulder 18 of the fastening'isagainst the clinch-plate, rigidly secured to the last, a very powerfulclamping action is exerted and the heel is firmly drawn againsttheheel-seat with sufiicient pressure to produce a tight crease and toenable the adhesive, while setting, to develop its maximum holdingeffect. After having maintained the engagement between the heel andheel-seat long enough for the adhesive to set thoroughly, the fasteningI4 is removed. 7

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is;

An integral fastening for use in temporarily securing a heel to theheel-seat of a shoe mounted upon a last provided with a clinch-plate,said fastening comprising an elongated, cylindrical head ofsubstantially uniform diameter throughout its length, a cylindrical hubof less diameter and less length than the head and projecting therefrom,the head terminating at its inner end in a shoulder inclined graduallytoward the hub and arranged to engage the clinch-plate of the last andsaid hub having at its inner end a flat shoulder of less diameter thanthe inclined shoulder and arranged to engage the heel-seat portion ofthe shoe upon the last, and a. threaded shank of less diameter than thehub and projecting therefrom, the shank and head being of substantiallythe same length.

EDWARD H. BASTABLE.

